:root {
  --bg: #0f0f12;
  --bg-alt: #16161c;
  --bg-card: #1c1c24;
  --bg-code: #111118;
  --fg: #e8e8f0;
  --fg-muted: #8888a8;
  --fg-faint: #444460;
  --accent: #7c6aff;
  --accent-glow: rgba(124, 106, 255, 0.18);
  --accent-2: #2dd4bf;
  --shadow: 0 4px 24px rgba(0,0,0,0.45);
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

html[data-theme="light"] {
  --bg: #f4f4f8;
  --bg-alt: #eaeaf0;
  --bg-card: #ffffff;
  --bg-code: #f0f0f5;
  --fg: #18181f;
  --fg-muted: #5a5a78;
  --fg-faint: #c0c0d4;
  --accent: #5b4ddb;
  --accent-glow: rgba(91, 77, 219, 0.12);
  --accent-2: #0d9488;
  --shadow: 0 4px 24px rgba(0,0,0,0.10);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--fg-faint);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--fg);
  font-weight: 700;
}
.brand-icon { font-size: 22px; color: var(--accent); line-height: 1; }
.brand-name { font-size: 20px; letter-spacing: -0.5px; }
.brand-version {
  font-size: 11px;
  font-family: var(--font-mono);
  background: var(--accent-glow);
  color: var(--accent);
  padding: 2px 7px;
  border-radius: 100px;
}
.header-nav { display: flex; align-items: center; gap: 4px; }
.header-nav a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}
.header-nav a:hover { color: var(--fg); background: var(--bg-alt); }
.theme-toggle {
  background: var(--bg-alt);
  border: none;
  color: var(--fg-muted);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
  transition: background 0.15s, color 0.15s;
}
.theme-toggle:hover { background: var(--bg-card); color: var(--fg); }

.hero { padding: 100px 0 80px; background: var(--bg); text-align: center; }
.hero-badge {
  display: inline-block;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent-2);
  background: rgba(45, 212, 191, 0.1);
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 28px;
  letter-spacing: 0.03em;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
  color: var(--fg);
}
.hero-accent { color: var(--accent); }
.hero-subtitle { font-size: 18px; color: var(--fg-muted); max-width: 560px; margin: 0 auto 40px; }
.hero-subtitle code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--accent-2);
}
.install-box {
  display: inline-flex;
  align-items: center;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 12px 20px;
  gap: 16px;
  box-shadow: var(--shadow);
}
.install-cmd { font-family: var(--font-mono); font-size: 16px; color: var(--fg); user-select: all; }
.copy-btn {
  background: var(--bg-alt);
  border: none;
  color: var(--fg-muted);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 16px;
  transition: background 0.15s, color 0.15s;
}
.copy-btn:hover { background: var(--accent); color: white; }